A comparative analysis of intrasexual and interspecific shape variation in cymothoid isopods based on geometric morphometrics

Key Points

• Shape variation among cymothoid isopods shows significant differences between intrasexual and interspecific groups, indicating distinct evolutionary paths.
• Key findings reveal that intrasexual shape variation is markedly influenced by ecological factors, with some species exhibiting unique adaptations.
• Employing geometric morphometrics, the analysis quantitatively assessed shape differences across various cymothoid isopod species and sexes.
• Understanding these variations offers insights into evolutionary mechanisms and could inform conservation strategies regarding these isopods.